1. Txheeb xyuas "CCC" daim ntawv pov thawj
Cov khoom siv hlau thiab cable yog cov khoom pov thawj kev nyab xeeb hauv tebchaws. Txhua tus neeg tsim khoom yuav tsum tau txais daim ntawv pov thawj "CCC" uas tau lees paub los ntawm Tuam Tshoj Cov Khoom Siv Hluav Taws Xob Cov Ntawv Pov Thawj, uas muaj nyob rau ntawm daim ntawv pov thawj lossis cov khoom lag luam.
2. Saib daim ntawv tshuaj ntsuam xyuas
Hlau thiab cable, raws li ib yam khoom uas cuam tshuam rau tus kheej thiab cov khoom muaj kev nyab xeeb, yeej ib txwm tau teev tseg raws li qhov tseem ceeb ntawm tsoomfwv saib xyuas thiab tshuaj xyuas, thiab cov chaw tsim khoom tsis tu ncua raug tshuaj xyuas los ntawm cov chaw saib xyuas nyob rau ib ntus. Yog li ntawd, tus neeg muag khoom yuav tsum muaj peev xwm muab cov ntaub ntawv soj ntsuam ntawm lub chaw soj ntsuam zoo, txwv tsis pub, qhov zoo ntawm cov khoom siv hlau thiab cable yuav tsis muaj lub hauv paus.
3. Saib ntawm lub ntim
Txhua lub tuam txhab tsim khoom lag luam uas ua tau raws li cov qauv hauv lub tebchaws yuav tsum tau ua tib zoo saib xyuas cov khoom ntim ntawm cov xov hlau thiab cables tsim. Thaum yuav khoom, them sai sai rau lub ntim zoo, luam ntawv ntshiab, ua tiav cov qauv specifications, lub Hoobkas lub npe thiab lub Hoobkas chaw nyob.
4. Saib qhov tsos
Cov tsos ntawm high -cov khoom siv hlau thiab cov khoom siv cable ua tau raws li tus qauv yuav tsum tau ua, yog du thiab puag ncig, thiab xim tsis sib xws. Cov khoom cuav thiab shoddy yog ntxhib thiab npub nyob rau hauv tsos. Rau cov roj hmab insulated saj zawg zog cables, qhov zoo li yuav tsum tau puag ncig, thiab lub sheath, rwb thaiv tsev thiab conductors yog nruj thiab tsis yooj yim rau tev tawm. Cov khoom cuav yog qhov ntxhib ntawm qhov tsos, loj hauv ovality, thiab qis hauv cov ntaub qhwv, uas tuaj yeem torn los ntawm tes.
5. Saib cov conductors
Tus neeg xyuas pib yog ci, thiab tus neeg xyuas pib qauv thiab qhov loj me ua tau raws li cov qauv hauv lub tebchaws. Hlau thiab cable cov khoom uas ua tau raws li cov kev cai ntawm lub teb chaws tus qauv, txawm lawv yog txhuas conductors los yog tooj liab conductors, kuj ci thiab tsis muaj kuab paug ntawm cov roj, yog li DC tsis kam ntawm cov conductors tag nrho conforms rau lub teb chaws qauv, nrog zoo hluav taws xob conductivity thiab siab. kev nyab xeeb.
6. Ntsuas cov xov hlau
The length of the cable is the main intuitive method to distinguish the products that meet the requirements of national standards and fake and shoddy products. When purchasing, don't be greedy for cheapness, and choose wires and cables whose actual meters are lower than their nominal meters. The length must match the nominal meter. The state stipulates that the allowable error is ±0.5 meters per 100 meters.
